SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3e3f0b121d1c1e4ab875828fb6652567931abbe35033fac3e5b547d81018f4d' 
  AND token = '7HTAZu3tU8pGF4ldD0WJQg2Y4a6jBpzTZfLqneTIFrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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