Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ab51a7e81e200fcf8f32bc01dcd988dff97398910215e818b508ea7aa1f92b3' 
  AND token = 'XVoHlhUk3kbshChrx0+vRMC/RFhwNKu57AX0yy1rcG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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