Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a25137cf7b08805e754d3b51c3d906ac413645812ab9bba34f235b925e34a67c' 
  AND token = 'V6B/PizFeMd8op1IvGmNtWR4r5wO/LrR4dnB00ZQGg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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