Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b23b02bbd645da33337f9c9dc85bf42302bc0941659cb1531747409733c00c0' 
  AND token = 'kRdVUyU+6SBgIeagLm0Q7kzyZ8qNALl1SzZpBCrEGuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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