SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e19fb3467280d85f6c6cec2561213592cce9bd353653e6c907176a1f7640768' 
  AND token = 'bdDjAuauCZhni6h4S4aYJrbzZWIb+QEq5ugdidsgU8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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