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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b672bbcd8e0a8e6b3c8e69c4ca4546dd5c8a0673e267dbf1905960e1959aebe7' 
  AND token = 'F897F2LmCTxpAIun6RddVEGssC6KpbPO2aTbJZWTcqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}