Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46c74052080a82c90a186909f887c96861c755869ea1a447224dbe3dee79eaae' 
  AND token = 'OZJMD3wtX+N4jQguB7MgWxaTpBQYpIEuSPMD2acbZ6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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