Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feb7657515015b77574105ca0a0c1bce51e2f9af90ed9d2352261ca835ecbf18' 
  AND token = 'jPN021RwLbpVxfD6xJeHmhd1BsHkFPCH1V/3QWYZvIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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