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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc79a0911717b843341eef7c752d7664764f83111a5431ca8addc200fe8fc307' 
  AND token = 'XAYCtltpZhTzJsI33dBBLZSlzlWXf/k3tg690Rqtpvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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