Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3199c1a4f67ae86b478b693e838f9c4f1c56c61448a3509af8d179b2cb41bb2' 
  AND token = 'qKn6gJcDMPRabN6az1B9Sa8H1DieVSAstWGl3pKIuNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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