Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94bcccb5da4088d415f0fa7ebb6be6f391f4059cb89af815d072e3ff4943e66e' 
  AND token = 'mezSLjHRui5+06ixF3Ouo7kXKebAQxcjkFCyfj6UVQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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