Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e0407ae9b35191d3718026d7bafd5406060c3f6a0365482a7480071beda6261' 
  AND token = 'GPofplE63AnqJa3pJe1cEtL4amrce8fkIU+o0qW3LwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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