Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8fba85764768b00f593a9f33b5d7b10d613988f83b4db82aafdde494d86e6e52' 
  AND token = '52/AyEA4Pnt0EuP5ixWxBE6F0j2YQFqSHmKEm9qfICg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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