Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c3915064023b78cf49e9071f9aaae85663823b248f0aca33dde194785569156' 
  AND token = 'ucW3p67S5TlThyt0iQEDlXOf5/EVyNIa/R0rY3aDTLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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