Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ca43199fb8f0b928ba5bc0b891587fdbd46338330fbcee9c322507acbcbf7e8d' 
  AND token = 'rt6ZwdHHpf641lSUesay8ySqfncq/1a1sWWGdnWGIBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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