Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f60973de769d4bf4ab42b4abb0c2afecbdcb1859495da4146043e347ef761b6' 
  AND token = '6651i96ffD6hDp6EI5Cq4J4N+xxkqGmLVh2i0u50iNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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