Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9791fe07485cab3d014b875abf2e1ab5c4e789e2e283fb50c5fd3ecc40338c48' 
  AND token = 'rq8Xc0zJBPzYI8u75Ex6woODvbJjmZR/CIjtEelXrPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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