Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1fb70e4f6fe25fe0dddc3f4defebe52cb938bdc1b7427a096269a4bc6f5b55e' 
  AND token = 'BPA0TTuYJcvO66zIm8/L5CSYR3iy/MKY6tL+7n7JlPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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