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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0635c999a85c1e2487ebcd93e0db227c5f3601e50dbb0ffa1d6aade03a99dae7' 
  AND token = '3I7NhK4+R2JCI4WG2JY3+HicGExBML2CY/abeae5lrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}