Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4fe87939d31358dc9c8c16eb155a7fde512f0fca291d2434ace10e2a7fe7784' 
  AND token = 'XNVair9WukDemTUXDLfK6FbQ2TqfCt+Hemx3ivl2/0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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