Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcadd70f2ea9e8bae72e6fefeaafee488118918b42409a9a37ef8f6cff3d0b6e' 
  AND token = 'Rqkv38K5/XtM5K7Y2zhDy23/9ZCWCp/R0e4lQQuuPXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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