Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68361c14b5bb6df05ff2daad0bbfbf8c754a825713ff905c8a74160f722c9f29' 
  AND token = 'fbNTZDFQblpHERT9cYn1LaogzHTB+BMIb4nzBCgK5ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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