Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f47f7e229db75def4570e4b3f01b135929f1dcca06f83a7ddae553710e8d19f4' 
  AND token = 'nYyzSwYXr/lfz9NvxNRjVI4WlAeoEZA7WQiHnRoyg3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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