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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac746f358120fdfd462fd59354171e55e4ead48a16fe477ae1761f74cd58b3c' 
  AND token = 'yKlPLXXYdC4x/9Sqvlyh8E9OqC0kkrXivMa3jwDffG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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