Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a048dc566f2ddacc90c22707008cd71152d2cfc0d3459a1ef9a9c90afbcdbf7d' 
  AND token = 'dcL3thj9TGV2HH1kD6ofKXPD9nsIQ5HJXDvICxoK1VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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