Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87982304d33bb0531e05e647893ba7e9f937bb00a55c4df6973c83767b6cc9f5' 
  AND token = 'AnaplhD7bM/0N660c/VxiqcoLtLq3wkEsugRDZxNvbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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