Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7323b20440d8950a2da029ddac4abcf879621d7c01f289682dd39df7ddd263d8' 
  AND token = '8dTafHZvA1/Osum7NPm1eGnYK8IefwpCfmdmko2nuTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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