Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '815f86a3e78183b0bfa593ab2c4ee949b0302a47b97ec3f5d70a6de6c35ac45c' 
  AND token = 'fSPnTUjb4MIr4i50asV89NCk6Q7TpLEDc2D0FECBqWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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