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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ed548703de81f827c9d1d4d5e2a79e4b9603b4b7c741f11c8f9a327a704ae66' 
  AND token = 'IMSdfcWs0Efy22bmhn7wCr2y0ZT7bBl1E5DC5fpVtKQ=' 
  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"
    }
  }
}