Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b19e5e07b0ab5ca09244414bdbe9e4656607eeed80c976ecda255e43ad2dd4ab' 
  AND token = 'Kocg2D2LBJoaVYvSdFN9L54SZIDx5rA9f0k+F2HjEhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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