Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a1f6121f68c22d7e8639f28154465dab96d2234cdd54c7212397ac9ca6a7bfe' 
  AND token = 'BA4V39ur2LU1sbBycjfJQsQZ5wHqEFSRx3m0gCWb3mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}