Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1975b2259df1e2893e9645eb70bc12d0dbf5cdfbd866bdda2f6b558d8f68d1c7' 
  AND token = '6mOX6cBty87cbMKj4JOgr644RSqloVX/mxQNCVA707c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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