Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0536ba624dad5a1794dfe2e284e03f14ff27cf95191085c2f4a00422a4858c8' 
  AND token = 'OKlcR6YrkTxwsu03nCY8M1WM0lnTbAe+1GyEVLeSRr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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