Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31fea7a5df9d1f0dd6e13c0358fa071391932a297d0cb86b1b16300fbce92172' 
  AND token = '0XoDRtj1lKU66YLn044CjbYvgYkAsQo0HOFjSfSgkAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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