Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1aec2d8f7ba385995fbe7c565b91d7ecf492bb2c4cfc709ed44c51177111e6c' 
  AND token = 'kE1vnVqJSUHZnY8Hkilbnh1Jhz7UEG0UHAOSLyqxak4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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