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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '010e1a1c730efb090cd150885989dcee25be96554a98fefe85a3c6308ca22601' 
  AND token = 'IHkcRhT0rviio7gqYrv69cy47tXg1IVB0b9hxj/iQRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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