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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '33d4e99c3dcef4287b8e5f14bb7d5eeee9680f09fcde83b07dd59df9b27a8e5e' 
  AND token = 'ogwZq+a0dUIOA5TMG8zh8hiesdd1YbYIgrgw+CrbFvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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