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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'daa0bfcd2bb65f2eaf27622a2662f92a40f87393f09e9dcc5e28d7e49382d456' 
  AND token = '8cvUm+XBJqDdtmipjdkyf9B+9w3MN4g0X0GCaTH+xOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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