Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f03a785fdc237a16a08b90889ea12385d0cb1206796111d07e82c9feb7ce514e' 
  AND token = 'h2OPiufXzAAaMHz7m8rwhM1zOU1XP5tDVOSoU8A+Q8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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