Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0d458866b0d956b5d0088ff336d8277c1c564cd3a6dbf89bd567aab5a3e45c8' 
  AND token = 'vHlEQpHo+APa3n3MZClUjAjG8ABihCDYCHEoBHbmGBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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