Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4175e0eb54abc78f810ccf52f989d3236a6ae5074f56e83bd83974685357c73' 
  AND token = 'oLfR1VA7G5+MbB3imMMKRjnBQS1xCAOt7toAhFztNYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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