Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c04c00be3f5f25759abf92dab39740bebe8bd5e1f0390d0308515531d4dc8200' 
  AND token = 'igPT6UGkzhy1uFaOQ7m++GejW84dD/kQDxk6cTVI+BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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