Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b69440ed9f4e02cd8d50f7e03aee80a4658804969e900f6abcdf3594161bb4d6' 
  AND token = 'blJHChLYNQIwvknEAu28q1xQ8LNYciRritbrOfzNf8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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