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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d6074f75ee97d97626e7997cf37e15ff76fd7fd27e19322e6ac522081d883f1' 
  AND token = 'MDCcX7FKB69WznDQEc0CI6UHcy0OmsvaDe1W0ZT6G+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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