SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95dad2d086703a2c9bc2c9ee6a0a65ac062327a7a295e541c7d9b16ce2f50436' 
  AND token = 'pf/NbOXN1jAAu0ho4tXBdsry13hYguEzk4OKYnjVIvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00351

JSON explain

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