Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8cae86d22bcd196468039e6edd4842c2d63df39b393581ccbdf56c9b5121637' 
  AND token = 'vYljByjg+f0sf+3Z4G3EUb0UQhU96+ionpj/sOlU2PU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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