Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c527f568b2f5887bf5a746bdac1b91b00bdcbb0b513194b0a6a189f46d08a1ca' 
  AND token = 'k9MN/xVetT3fwphHQe0h9NYqPyeTys3zTB0iyCt/fbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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