Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7742e7d33bda5bfa8cdb409102ab797cb3e8755698c11d124f327a8c9c591bb' 
  AND token = 'FIL4mQKDF8E80X/arzC0L3HpONNQEXtG2ApOY01vpLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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