Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbce1dbb9755555a5abc0a4868a318fdd8637191cb5c88ff5a48139b1975c917' 
  AND token = '1+kaCo6lH4JTQub48Fflh27RSvac2LXcnEPnME4U7dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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