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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2a55b7b2b95c57e51b713778ba25b272ef2c5ede08bdb7bbd8d4008ebd769bfc' 
  AND token = 'TG30cZsbt8b27wtos9Q2jQwWeia02cKrniWqfjMDU3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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