Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d504ea2d1cfa5f5bd773d0f6a525b44f2a3e2102e4ea57597e01881f367188d' 
  AND token = 'jd1ssAYyBawlMXOJC/+14DGwZAlEC8DiT/vFCU0nc0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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