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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ffa115735b2deba9cbfeb4f5bdfb59ade86af4e9acc1c40ceeeac384a9569f7' 
  AND token = 'PIios4/s0kTxVX8Yoru4rQejF7GXq7Yz9HCJ9QuVqVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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