Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e114198358d0dd82bd5a2617df0745d6816875ae8e5a03b53f6a0ee09c27261' 
  AND token = 'PcytGTXcDLPl1/EUet5Td4FrEFwFiawJbPPGT77rEps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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