Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1162d75366fcec2e520ef067438c6588ff4e4d16916d0e7998a01d54bc9913ab' 
  AND token = 'BWJ8FvWDSLD1LpkuQJcENk3kbQnL6/8y9NTQ6NDJ3Z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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