Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41687c42da536bea2edea4465b16bc36395a1f086f8914c68b6cc8ad60edd2b5' 
  AND token = 'UFRZtQrhYwmOCAFIPPd6jwcMXfgOuwENhw+g71jbXys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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