Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67f8fda81d0b04d7b2103134218a7416b67da6eae2fc06aa3d8bad9361062662' 
  AND token = 'ps3ENdnsKGIMEbDh+KDvEmJZFVn53r3rl8vDZ4tmELU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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