Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a2ef531e9e28731c7f33d512fb96c57df6b6570fc7520e47738399e66f2ad62' 
  AND token = 'wBJxDQKCTPQ7OpcdcTY6Rvv0rbmvpo9PUhhh73fqYCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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