Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '67988f86c9f7f968e1116ba4ae1219326fa2209b0fcb19fc029872624a3c60d9' 
  AND token = 'Y9WqpM0JSc7jstrR70TdOvN4/im9VCBfqbc3FzzfEqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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