SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f7de11e7823528e5bc076cd6ed771b57909fa4fab600fcb445a3076d7c1812e' 
  AND token = 'oYqD46WonJ2Gwtv0GIiLr++5a5EKBVwZCPKVy8j77lQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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