Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb2bb8d0644127600853e949119e137b2fc368f20827b5c5aabf052cbdfe1cbc' 
  AND token = 'aeAtnfKCVbaFjxYcLiDP3PRkjKD0GPFaidbglm+n+Fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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