Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '592b4c194774c80f2cb34d3cb4dba6c6e6fa2595edb9144ce7b2b2bfd8d623bc' 
  AND token = 'wCULQPl3aDqt6eMJ3HEs03Wi220DbsD+fx+FC69t1Ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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