Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3994d35709fa3e95901bb6ed3dd4bfe55db7692bf780be47b4caf296938148b' 
  AND token = 'lEoimVsigKCADeiKQOTFdgV5jTf+L0VCNcR2/teuixw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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