Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '587fdbcfcac9a23251ba3b6298006b9ac575eb43219084c7d20193b92a9ba5ed' 
  AND token = '20++/rghBlB+f399G9u8BVmzaB2NHg4XCa2Fer4Nh68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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