Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd22c12bc3321c733e36c61153f31d9d2570f79a1e9f9e10baef42de031d0192' 
  AND token = '4mnkSYks6qzQrTAjO6G4HUgw95hJBQBimnCEigMM7yY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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