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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22075d80dc42811207d1ce6f4794455cc9cf61bb57129ae624c0c398e2405d40' 
  AND token = 'Uy/eNo5vL7CoZ3F+771+71j9j2XZm8Cle/s8vThVbsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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