Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8b098b74aa265a94a42e37c67bbf2d1992f1e48921fde91b45b6e4a26e2df1' 
  AND token = 'U7aM27WjJoijtLAoJWtUULGECX9evLliQ6NmhCoHGfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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