Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '523eb692acfc6c13da99dfa46ebc61097c591838c78a5b98365a846f5d973e5d' 
  AND token = 'sXNBRBSXjvMRdAZqZ+vMtuxPW2cPZskCdGAHqM2BtII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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