Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47e01efaca07e991ba8da867ed2d5784579b11970d311b1efc3b3b8918e28abf' 
  AND token = 'Y1tHOwgRLPa0cqiwPaHp5nJ9PS4Nt3ayaC5DUWeSNDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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