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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5b2eb87312cbd013c21b9a5e7abc19e7478c89ae37accf4dc2052ea55e7700a2' 
  AND token = 'N+O8q7xHyg0hHGzZDRe6bUhfY1E27H9lNjxim/7ncwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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