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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce3f923b01425cf9f6a2b241b2e81ca0012cee73af5a4f4a4f0bc9dca1696927' 
  AND token = 'tiYErTHHuFd8eRO5d868K84tgIlkkx609GtboStvd38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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