Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a76191c371f23f0aa313be891dead4418a4d036a37b2bf8264984673aa3cd55b' 
  AND token = 'itZPj60P3o6OX5fcqGZUcL3t37gsR9M6YezVzVNvfyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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