Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d02be432eb212c636c31660340d6959a320214a0372f689a7d3cfeb3587bdc' 
  AND token = 'JMSyYcayozZT2FHmm8LE/B/LB2sLT8L9MOaO/lquf20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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