Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dffc4ed5e58b86a2256c103a97ecc52b94fb6f869820899e5d20916d70d1e0d3' 
  AND token = 'tL9YKeSTEBWqtLLCq1912R+5eqXHcCY6a//Quo/f+g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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