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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a91c27e730b316e2605a9cd681ddf898083b9a71f4293114bd24b516eade7e9' 
  AND token = 'C8pOKKxlRCeCnx+vcST0iJypKtqe5I2xysc0XwtNS+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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