SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'facab545cc871f89ef97b34b71fc7d16ac926167f4a2010ec23038be7a4c0e96' 
  AND token = 'ZeJ6jq7Yu2zyKnVDQ9epl6Ri+NaQpBHQUn9a/epwf2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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