Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c53160caf6ddc36bdcb2f25653af322cd8b4f7e7439c630fd81553fdf8f5c9c4' 
  AND token = 'fbKBD93Skog+G3r0WpsRNEvdJ5+O8j9KGju8YbkfSRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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